Fixing Spiral Topology
Go into edge mode &#9096; Ctrl&#8633; Tab and &#9095; Alt RMB select the spiraling edge loop. Follow it untill you hit a pole vertex with an uneven edge count.

Starting from the pole vertex, &#8679; Shift RMB select the chain of vertices which is perpendicular to the spiraling loop. V Rip them, then make new faces F joining the correct vertices on both sides.